Fastening for harvester-knives.



,6 56. Patented July 25, I899.

w. c. BUSH.

FASTENING FOR HABVESTER KNIVES.

(Application filed Feb. 11, 1899.)

(No Model.)

, q Vihwooey THE NORRIS PETERS co., PHOTOLITMOU WASHVNGTON. n. c.

UNITED STATES PATENT FFICE.

FASTENING FOR HARVESTER-KNIVES.

SPECIFICATION formingpart of Letters Patent No. 629,656, dated July 25, 1899.

Application filed February 11, 1899. Serial No. 705,286. (No model.)

T0 all uhom, it may concern.-

Be it known that I, WILLIAM C. BUsH, a citizen of the United States, residing at Wil mington, in the county of New Castle, State of Delaware, have invented a newand useful Improvement in Fastenings for Harvest-er- Knives, which improvementis fully set forth in the following specification and accom pan ying drawings.

My invention consists of a fastener for a harvester-knife embodying a key of the form of a cross-head and a seat on the cutter-bar, whereby the knife may be-firmly clamped to said bar and thereby reliably connected therewith.

It also consists of details of construction, as will be hereinafter described, and pointed out in the claims that follow the specification.

Figure 1 represents a top plan view of a fastener for a harvester-knife embodying my invention. Fig. 2 represents a bottom plan thereof. Fig. 3 represents a perspective view of the key of the fastener, the knife, and bar in separated condition. Fig. 4 represents a section on line :0 00, Fig. 1.

Similar letters of reference indicate corresponding parts in the figures.

Referring to the drawings, A designates a cutter-bar, and B designates a knife thereon. In the said bar is the slot 0, and in the knife is the slot D, said slots being in communication and adapted to receive the head E of a key which is connected with the lever or arm F, thelatter being adapted for the convenient rotation of said head on the upper side of the knife. The slots 0 and D have radial extensions or end slots G and H, and the head of the key has radial tongues J projecting therefrom, the same being adapted to enter said end slots G and H and forming, with said head, a crosshead. In the bar under the side wall of the slot 0 are shoulders K, which are on opposite sides of said slot.

The operation is as follows: The knife is placed on the bar and the cross-head E J inserted through the slots 0 D G H and rotated, say, a quarter-turn, whereby the tongues J leave the slots G and H and ride on the shoulwhile the heads of the levers cover the openings D H and overhang the walls thereof as the upper part of the fastening. In order to prevent any possible shifting of the knife on the bar, the latter is provided with studs L, which enter openings in the knife. When the cross-head is rotated in the reverse direction until the tongues J register with the end slots G H, the key may be entirely withdrawn from the bar and knife and the latter removed, as is evident.

In order to prevent the improper release of the key when the knife is locked by the same on the bar, the arm F is provided with the spring-catch N, the latter being adapted to drop into a recess Pin the knife, but may be overcome by superior force when the key is to be rotated to disengage the knife.

In the arm above the head E are recesses Q to receive studs or jaws on a wrench or other implement for rotating said head, especially when it is desired to dispense with the main length of said arm, a portion of the latter, however, remaining on said head as a flange which rests on the upper face of the knife and overhangs the wall of the slot D.

Having thus described my invention, what I claim as new, and desire to secure byLetters Patent, is

1. In a fastening for a harvester-knife, a rotatable annular head with a tongue radiating from the periphery thereof, a knife having a circular opening therein with a radial slot extending from the periphery thereof, and a cutter-bar having a slot therein to receive said head and a shoulder at the base of said slot for the engagement of said radiating tongue.

' 2. In a fastener for harvester-knives, annular heads, tongues on said heads, knives with slots, a cutter-bar with slots, and levers secured to said heads for rotating the same, said levers being adapted to cover the slots of the knives and forming a continuous bar when the knives are secured,

3. In a fastening for a harvester-knife, a rotatable head with a tongue radiating therefrom and-a cutter-bar having a slot for the reception of said head and ashoulder for the engagement of said tongue, an arm carrying said head and means for locking said arm. WILLIAM C. BUSH.

Witnesses:

JOHN A. WIEDERSHEIM, WM. 0. WIEDERSHEIM. 

